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Finding the Fourth Proportional to 20,643.48, 30,965.13 and 7,495.56

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Solution

The fourth proportional to 20,643.48, 30,965.13 and 7,495.56 is: 11,243.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,643.48 : 30,965.13 = 7,495.56 : x
  2. Step 2: Convert to fraction form
    20,643.48/30,965.13 = 7,495.56/x
  3. Step 3: Cross multiply
    20,643.48x = 30,965.13 × 7,495.56
  4. Step 4: Simplify right side
    20,643.48x = 232,100,989.82
  5. Step 5: Solve for x
    x = 232,100,989.82/20,643.48
  6. Step 6: Final answer
    x = 11,243.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.